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3 years ago

Help!!!!!!! I will make you brainliest

Mathematics

1 answer:

Nina [5.8K]3 years ago

3 0

Answer:

Step-by-step explanation:

(a) The appropriate formula is C = 2πr. Here r = 14 cm, so

C = 2π)14 cm = 28π cm, or (if we take π to be 22/7), C = 88 cm²

(b) We use the same circumference formula: C = 2πr and solve it for r before inserting numeric values:

C 132 m 7(132 m)

r = -------- and in this case, r = ------------------- = ------------- = 21 m

2π [ 2 * (22/7) ] 44

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Officer Brimberry wrote 32 tickets for traffic violations last week, but only 12 tickets this week. What is the percent decrease

kolbaska11 [484]

Answer:

62.5 %

Step-by-step explanation:

you have to subtract 32-12, which equals 20

then divide 20 by the original amount (20/32)

20/32= .625, then you have to multiply to get the final answer...hope this helped!

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2 years ago

Find the standard form of the circle x2 + y2 – 6x + 10y + 24 = 0 by completing the square.

hichkok12 [17]

Answer:

$(x-3)^2+ (y+5)^2=10$

Step-by-step explanation:

Given the equation of the circle: $x^2 + y^2 - 6x + 10y + 24 = 0$

We wish to express it in a Standard form:

We begin by re-arranging:

$x^2 - 6x + y^2 + 10y = - 24$

Next, divide the coefficient of x by 2, square it and add it to both sides.

Do the same for y.

$x^2 - 6x +(-3)^2+ y^2 + 10y+5^2 = - 24+(-3)^2+5^2$

Next, we factorize

$(x-3)^2+ (y+5)^2 = - 24+9+25\\(x-3)^2+ (y+5)^2=10$

This is the standard form.

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3 years ago

What percent of 280 is 67.2

Fiesta28 [93]

Answer:

Step-by-step explanation:

percent of 280 is 67.2

280×y/100=67.2

280y/100=67.2

2.8y=67.2

divide by 2.8

y=24

verify

280×24/100=67.2

6720/100=67.2

67.2=67.2

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Answer:

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